Nonlinear optical crystal caesium borogermanate

Abstract

The invention relates to nonlinear optical crystal caesium borogermanate which belongs to a nonlinear optical material and synthesis thereof. The crystal has a chemical formula of CsGeB3O7 and the molecular weight of 249.93, belongs to a rhombic system and has a space group of Pna21 and unit cell parameters that a is 9.542(3)*, b is 9.823(3)*, c is 7.009(2)*, V is 6557.0(3)*3, and Z is 4. The caesium borogermanate (CsGeB3O7) is prepared by a high-temperature solid phase method and has good nonlinear optical performance, and the SHG coefficient of e caesium borogermanate powder is 1.5 times of that of KDP.

Description

technical field

[0001] The invention belongs to nonlinear optical material and its synthesis. Background technique

[0002] Nonlinear optical crystals, with frequency doubling effect (SHG), have important application value in high-tech fields such as laser frequency conversion, electro-optical modulation, and photorefractive information processing. Nonlinear optical materials are used in modern science and technology, especially in several military and civilian high-tech fields, such as submarine deep-water communication, laser blinding weapons, marine fish detection, optical disc recording, color laser printing, laser projection TV, optical computing and Optical fiber communication, etc., have a series of important applications. The nonlinear optical crystals currently used in practice include LiB 3 o 5 (LBO), β-BaB 2 o 4 (BBO), KH 2 PO 4 (KDP), KTiOPO 4 (KTP), LiNbO 3 (LNO) and BaTiO 3 (BTO) and so on. Recent studies have shown that the combination of Se(IV) and...